The properties of the galaxy populations in fossil and non-fossil systems have been also analysed using cosmological simulations. [1]} reported from cosmological hydrodynamical simulations and semi-analytical models that fossil and non-fossil systems show different star forming rates at low \(z\) , being indistinguishable at \(z > 0.5\) . In contrast, [2]} found no differences in the stellar age, metallicity and star formation rates of BCGs in fossil and non-fossil systems from the Illustris Simulation. [3]} analysed the properties of the black holes developed in the center of the BCGs for fossil and non-fossil systems. They found that the mass of the black holes hosted in BCGs is larger in dynamically evolved groups with a lower rate of mass accretion, a result confirmed also in [4]}.
